Energy-Efficient Use Of The Heat Pump; Purpose Of The Heat Pump; Application; Operation Principle - Dimplex SI 130TUR+ Installation And Operating Instruction

SI 130TUR+
1.4 Energy-Efficient Use of the Heat
Pump
By operating this heat pump you contribute to the protection of
our environment. The heating or cooling system and the heat
source must be properly designed and dimensioned to ensure
efficient operation. In particular, it is important to keep water
flow temperatures as low as possible. All energy consumers
connected should therefore be suitable for low flow tempera-
tures. A 1 K higher heating water temperature corresponds to
an increase in power consumption of approx. 2.5 %. Low-tem-
perature heating systems with flow temperatures between
30 °C and 50 °C are optimally suited for energy-efficient opera-
tion.
2

Purpose of the Heat Pump

2.1 Application

The brine-to-water heat pump is to be used exclusively for the
heating and cooling of heating water. It can be used in new or
previously existing heating systems. The mixture of water and
frost protection (brine) acts as a heat transfer medium in the
heat source system. Ground probes, ground heat collectors or
similar systems can be used as heat source systems.
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2.2 Operation principle

Heating
The heat generated by the sun, wind and rain is stored in the
ground. This heat stored in the ground is collected at low tem-
perature by the brine circulating in the ground collector, ground
coil or similar device.
A circulating pump then conveys the warmed brine to the evap-
orator of the heat pump. There, the heat is given off to the re-
frigerant in the refrigeration cycle. When so doing, the brine
cools so that it can again take up heat energy in the brine cir-
cuit.
The refrigerant is drawn in by the electrically driven compres-
sor, is compressed and "pumped" to a higher temperature level.
The electrical power needed to run the compressor is not lost in
this process, but most of the generated heat is transferred to
the refrigerant.
Subsequently, the refrigerant is passed through the condenser
where it transfers its heat energy to the heating water. Based on
the thermostat setting, the heating water is thus heated to up to
58 °C.
Cooling
The functions of the evaporator and the liquifier are reversed in
the "Cooling" operating mode.
The heating water gives up its heat to the refrigerant via the liq-
uifier which is now functioning as an evaporator. The refrigerant
is pumped to a higher temperature level using the compressor.
Heat passes into the brine via the liquifier (evaporator in heating
operation) and consequently into the ground.
2.3 Functional description for
integrated thermal energy
metering
The compressor manufacturer's performance specifications for
different pressure levels are stored in the heat pump software.
Two additional pressure sensors for determining the current
pressure level are installed in the refrigerating circuit, one be-
fore and after the compressor. The current heat output can be
calculated from the compressor data stored in the software and
the current pressure level. The integral for the heat output over
the runtime gives the quantity of thermal energy supplied by
the heat pump, which is displayed separately for heating, do-
mestic hot water preparation and swimming pool water prepa-
ration on the manager's display.
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